For a high stakes election I would take the most trustworthy system. So give me an argument why I should invest money into building a less trustworthy one?
Because it I get results faster? I don't care about speed, high stakes elections are rare enough for that not to matter.
Because it is more efficient? I don't care about efficiency, I want the result to be accurate and the process to be understandable by the stupid bloke in the pub with whom I have to discuss the result.
There is literally no reason why this should be replaced by a digital system other than it makes us needs feel special.
Paper ballot voting systems are generally more secure than electronic voting systems, but things are not black and white. There are differences amongst different paper ballot voting systems. There are also voting systems which combine both electronic and paper features. For example, a purely paper voting system can be trivially made more secure by adding electronic machines to prevent voters from accidentally spoiling ballots.
Exactly, so the rest of your criticism isn't nearly as strong, if it applies to all means of voting.